Heterocyclic Organic Compound for OLED Brightness and Lifetime

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Solution Overview

Problem

There is a continuous need for novel materials in organic light emitting devices that offer excellent brightness, color purity, and long lifetime.

Innovation Solution

A compound represented by Chemical Formula 1 is used as a material for organic light emitting devices, which can function as a hole injection material, hole transport material, light emission material, electron transport material, or electron injection material, improving efficiency and lifetime characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If conventional organic materials are used in organic light emitting devices, then the device can operate with basic functionality, but the brightness, color purity, and lifetime are insufficient

Engineering Contradiction:

ImprovebrightnessVSAvoidlifetime

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The patent modifies the molecular structure of organic compounds by changing chemical parameters such as introducing specific heterocyclic groups (triazine, pyrimidine, pyridine rings with nitrogen atoms) and adjusting substituent positions to optimize electronic properties, thereby simultaneously improving brightness, color purity, and device lifetime

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses composite organic compounds that combine multiple functional groups (electron-deficient heterocyclic rings with electron-rich substituents) within a single molecular structure, enabling the material to exhibit multiple desirable properties including high brightness, pure color emission, and enhanced stability for extended device operation

Inventive Principle:

Principle #40Composite materials

2Illumination intensity

If novel organic compounds with improved performance are developed, then brightness and color purity are enhanced, but the complexity of material synthesis and device manufacturing increases

Engineering Contradiction:

ImprovebrightnessVSAvoidmanufacturing complexity

Core Design Contradiction:

Illumination intensityVSEase of manufacture

Solution Approach 1:

The complex organic compound is divided into recognizable functional modules (core heterocyclic structure with specific substituents), allowing systematic synthesis through modular assembly of precursor molecules, which simplifies the manufacturing process while maintaining the desired performance characteristics

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The designed organic compound serves multiple functions simultaneously: it acts as a host material for light emission, provides charge transport pathways, and ensures device stability, thereby reducing the need for multiple separate materials and simplifying the overall device manufacturing process

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The compound enhances the efficiency and extends the lifetime of organic light emitting devices by providing improved brightness and color purity, with the ability to be used in various organic material layers.

Implementation Method 1

organic light emission refers to a phenomenon in which electrical energy is converted into light energy using an organic material

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS11641778B2Compound and organic light emitting device comprising same

Publication Date: 2023.05.02 LG CHEM LTD

AI summary

Provided are a compound of Chemical Formula 1:and an organic light emitting device including the same.